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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id d10-20020a170902654a00b001b8b2b95068sm3397478pln.204.2023.09.01.12.50.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Sep 2023 12:50:30 -0700 (PDT) Date: Fri, 1 Sep 2023 12:50:29 -0700 From: Kees Cook To: Masahiro Yamada Cc: Nicolas Schier , Michael Ellerman , Christophe Leroy , Randy Dunlap , linux-kernel@vger.kernel.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-hardening@vger.kernel.org Subject: Re: [PATCH v3] kbuild: Show marked Kconfig fragments in "help" Message-ID: <202309011250.AB0DAA03@keescook> References: <20230831191335.give.534-kees@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org On Fri, Sep 01, 2023 at 04:58:37PM +0900, Masahiro Yamada wrote: > On Fri, Sep 1, 2023 at 4:13 AM Kees Cook wrote: > > > > Currently the Kconfig fragments in kernel/configs and arch/*/configs > > that aren't used internally aren't discoverable through "make help", > > which consists of hard-coded lists of config fragments. Instead, list > > all the fragment targets that have a "# Help: " comment prefix so the > > targets can be generated dynamically. > > > > Add logic to the Makefile to search for and display the fragment and > > comment. Add comments to fragments that are intended to be direct targets. > > > > Cc: Nicolas Schier > > Cc: Michael Ellerman > > Cc: Christophe Leroy > > Cc: Randy Dunlap > > Cc: linux-kernel@vger.kernel.org > > Cc: x86@kernel.org > > Cc: linux-arm-kernel@lists.infradead.org > > Cc: linuxppc-dev@lists.ozlabs.org > > Cc: linux-riscv@lists.infradead.org > > Cc: linux-s390@vger.kernel.org > > Cc: linux-kbuild@vger.kernel.org > > Cc: linux-hardening@vger.kernel.org > > Signed-off-by: Kees Cook > > Co-developed-by: Masahiro Yamada > > --- > > v3: > > - Use Makefile logic from Masahiro Yamada > > - Use "# Help: " prefix, but only on desired fragment targets > > v2: https://lore.kernel.org/all/20230825194329.gonna.911-kees@kernel.org > > v1: https://lore.kernel.org/all/20230824223606.never.762-kees@kernel.org > > --- > > Makefile | 1 - > > arch/arm/configs/dram_0x00000000.config | 1 + > > arch/arm/configs/dram_0xc0000000.config | 1 + > > arch/arm/configs/dram_0xd0000000.config | 1 + > > arch/arm/configs/lpae.config | 1 + > > arch/arm64/configs/virt.config | 1 + > > arch/powerpc/configs/disable-werror.config | 1 + > > arch/powerpc/configs/security.config | 4 +++- > > arch/riscv/configs/32-bit.config | 1 + > > arch/riscv/configs/64-bit.config | 1 + > > arch/s390/configs/btf.config | 1 + > > arch/s390/configs/kasan.config | 1 + > > arch/x86/Makefile | 4 ---- > > kernel/configs/debug.config | 2 ++ > > kernel/configs/kvm_guest.config | 1 + > > kernel/configs/nopm.config | 2 ++ > > kernel/configs/rust.config | 1 + > > kernel/configs/tiny.config | 2 ++ > > kernel/configs/x86_debug.config | 1 + > > kernel/configs/xen.config | 2 ++ > > scripts/kconfig/Makefile | 15 ++++++++++++--- > > 21 files changed, 36 insertions(+), 9 deletions(-) > > > > > Just one thing. > > > > > > > diff --git a/kernel/configs/tiny.config b/kernel/configs/tiny.config > > index 00009f7d0835..60a4b6d80b36 100644 > > --- a/kernel/configs/tiny.config > > +++ b/kernel/configs/tiny.config > > @@ -1,3 +1,5 @@ > > +# Help: Size-optimized kernel image > > > I will drop this. > > > We already have a hard-coded help message. > > tinyconfig - Configure the tiniest possible kernel > > > > > Then, some lines below, again. > > tiny.config - Size-optimized kernel image > > > > tiny.config is for internal use for tinyconfig. Shall I send a v4, or did you fix this up already? -- Kees Cook From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E6B8BCA0FF8 for ; Fri, 1 Sep 2023 19:50:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ZXEgw3954S1QSkKnKWpPJuii6ilISz+vtOLzXtOmymA=; b=beEPZ01mvp9KhO vkcHLWBN7Fp/GMCAL0/vxuo4g5if+zP9wT8zTDQrMn7QByLXB3ZcQDn1XMeQEvLO518RwWB8f2tyT Y5XmIkeS+SRf2/5xDNWAFp0HbVaQ3Y34I8Kp5AR4JmLMLvLmvagKcwE/kSWNBleEg/0DSR1pEILPg 0XSUonc3v9+JIgP9X/wZ6APfig3T8KJQ/0U4D+r5F9noipZhrvjdXCUoPPHBYVV/d94dvePu9NYnq 71+XCtGkL5s3jAKkgGWlYseZISXfgJ9ql8mYS1Vvw+MTpiFTfpc/XkVgheRKYRqXTl/3Uz/5Nejr1 SI2HPBK35NqhszG09YQw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qcAA8-000KwZ-2o; Fri, 01 Sep 2023 19:50:36 +0000 Received: from mail-pl1-x62c.google.com ([2607:f8b0:4864:20::62c]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qcAA5-000KvA-1V for linux-riscv@lists.infradead.org; Fri, 01 Sep 2023 19:50:35 +0000 Received: by mail-pl1-x62c.google.com with SMTP id d9443c01a7336-1bf3a2f4528so19498545ad.2 for ; Fri, 01 Sep 2023 12:50:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1693597831; x=1694202631; darn=lists.infradead.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=TnGlOgpcJfhSyX3oWtweduRxRFI+vcvjVBEfz8W6REE=; b=kAfJhIU7Z0kMFLPzqnleHU+2nD0JRJWDzV8LQ+5su8TxrAl8+xpA4CM6SJCVrOTSGS RwdUNfagFjmIhKcxBN01QHjzXK8k30sYmK1PylsobaDwGCV7mzIu/9Umtg225V6jlwFZ oD6ExlgQjZPSq34q3NGqQxEdnNeO564i3XPl0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693597831; x=1694202631; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=TnGlOgpcJfhSyX3oWtweduRxRFI+vcvjVBEfz8W6REE=; b=cQykqeyOfQ95RvYohhwss4+v6RRBz4lyCUlFe3+kR4QkLfWDd5SjLyLeBVh3wDpNev 5kwQ9/cafKmhOFrBtoVZXyQpIgTGLUVP4rPJHoIo139aheG2PCnJHQxX0WCNQXkvmBoo G+ZmbpN3cf16RutpvwNtnsoUWJkDke9Cj31/rFPN4rvArfdRwGMD3SVpPfHikGivh8Rr gAcXLqKiyDfZQCBK6WF/jSp+UQrataqLxgpwzjBui/KLVyDtKMvAxy/zkQnuWHllUi+q kEAAahbmQH+tO0O5jYYvs5Aet08eZ3DF/ZeeG677yD2tC1++mN46ouJmLgFR+PZ5UCcB A/yw== X-Gm-Message-State: AOJu0Yz72AWf3Nl2e8/whD90OG4FSQZHLXWAjdmyQMDGNFFR1roEej/x i285paAbyXhv/e8iL0VfhEjOeQ== X-Google-Smtp-Source: AGHT+IFLMLtB06xgjItzzUv50zhsXFZ37ehwBfgJSIF2V6heU41cis1M/xhTkDTyzQL7J2okpu7MHw== X-Received: by 2002:a17:902:f682:b0:1c0:b7f4:5b86 with SMTP id l2-20020a170902f68200b001c0b7f45b86mr3871500plg.65.1693597830846; Fri, 01 Sep 2023 12:50:30 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id d10-20020a170902654a00b001b8b2b95068sm3397478pln.204.2023.09.01.12.50.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Sep 2023 12:50:30 -0700 (PDT) Date: Fri, 1 Sep 2023 12:50:29 -0700 From: Kees Cook To: Masahiro Yamada Cc: Nicolas Schier , Michael Ellerman , Christophe Leroy , Randy Dunlap , linux-kernel@vger.kernel.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-hardening@vger.kernel.org Subject: Re: [PATCH v3] kbuild: Show marked Kconfig fragments in "help" Message-ID: <202309011250.AB0DAA03@keescook> References: <20230831191335.give.534-kees@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230901_125033_571046_36F6E920 X-CRM114-Status: GOOD ( 24.48 ) 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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id d10-20020a170902654a00b001b8b2b95068sm3397478pln.204.2023.09.01.12.50.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Sep 2023 12:50:30 -0700 (PDT) Date: Fri, 1 Sep 2023 12:50:29 -0700 From: Kees Cook To: Masahiro Yamada Subject: Re: [PATCH v3] kbuild: Show marked Kconfig fragments in "help" Message-ID: <202309011250.AB0DAA03@keescook> References: <20230831191335.give.534-kees@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, Randy Dunlap , Nicolas Schier , linux-kbuild@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, Sep 01, 2023 at 04:58:37PM +0900, Masahiro Yamada wrote: > On Fri, Sep 1, 2023 at 4:13 AM Kees Cook wrote: > > > > Currently the Kconfig fragments in kernel/configs and arch/*/configs > > that aren't used internally aren't discoverable through "make help", > > which consists of hard-coded lists of config fragments. Instead, list > > all the fragment targets that have a "# Help: " comment prefix so the > > targets can be generated dynamically. > > > > Add logic to the Makefile to search for and display the fragment and > > comment. Add comments to fragments that are intended to be direct targets. > > > > Cc: Nicolas Schier > > Cc: Michael Ellerman > > Cc: Christophe Leroy > > Cc: Randy Dunlap > > Cc: linux-kernel@vger.kernel.org > > Cc: x86@kernel.org > > Cc: linux-arm-kernel@lists.infradead.org > > Cc: linuxppc-dev@lists.ozlabs.org > > Cc: linux-riscv@lists.infradead.org > > Cc: linux-s390@vger.kernel.org > > Cc: linux-kbuild@vger.kernel.org > > Cc: linux-hardening@vger.kernel.org > > Signed-off-by: Kees Cook > > Co-developed-by: Masahiro Yamada > > --- > > v3: > > - Use Makefile logic from Masahiro Yamada > > - Use "# Help: " prefix, but only on desired fragment targets > > v2: https://lore.kernel.org/all/20230825194329.gonna.911-kees@kernel.org > > v1: https://lore.kernel.org/all/20230824223606.never.762-kees@kernel.org > > --- > > Makefile | 1 - > > arch/arm/configs/dram_0x00000000.config | 1 + > > arch/arm/configs/dram_0xc0000000.config | 1 + > > arch/arm/configs/dram_0xd0000000.config | 1 + > > arch/arm/configs/lpae.config | 1 + > > arch/arm64/configs/virt.config | 1 + > > arch/powerpc/configs/disable-werror.config | 1 + > > arch/powerpc/configs/security.config | 4 +++- > > arch/riscv/configs/32-bit.config | 1 + > > arch/riscv/configs/64-bit.config | 1 + > > arch/s390/configs/btf.config | 1 + > > arch/s390/configs/kasan.config | 1 + > > arch/x86/Makefile | 4 ---- > > kernel/configs/debug.config | 2 ++ > > kernel/configs/kvm_guest.config | 1 + > > kernel/configs/nopm.config | 2 ++ > > kernel/configs/rust.config | 1 + > > kernel/configs/tiny.config | 2 ++ > > kernel/configs/x86_debug.config | 1 + > > kernel/configs/xen.config | 2 ++ > > scripts/kconfig/Makefile | 15 ++++++++++++--- > > 21 files changed, 36 insertions(+), 9 deletions(-) > > > > > Just one thing. > > > > > > > diff --git a/kernel/configs/tiny.config b/kernel/configs/tiny.config > > index 00009f7d0835..60a4b6d80b36 100644 > > --- a/kernel/configs/tiny.config > > +++ b/kernel/configs/tiny.config > > @@ -1,3 +1,5 @@ > > +# Help: Size-optimized kernel image > > > I will drop this. > > > We already have a hard-coded help message. > > tinyconfig - Configure the tiniest possible kernel > > > > > Then, some lines below, again. > > tiny.config - Size-optimized kernel image > > > > tiny.config is for internal use for tinyconfig. Shall I send a v4, or did you fix this up already? -- Kees Cook From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4D110CA0FEC for ; Fri, 1 Sep 2023 19:51:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=JtGoTk42WX/2nm2Ml0gA4e6+yOv3hqGbkp/bt1ZnGQA=; b=Nu3X1Gq9tu8FZM VV04OOrNWgVxJUJ8s8Zht7xjjHZZOBl/ApFqsr9fO3GwgZHscCBPJolc4/gFhzXfzn7h4f+OU14JP sWF8Mkz+CTPpeHBxGC5kBq9vsOPlYzXM58lc5xfy41Uevl+DKhdofVPbdGBv3MQxWETHLrILE02vb 1R3qtRsXt3dGcyVIsaea6RejuM4vp6dZ+N+WmOCbEQFY4iykU4IKk0NtWtICBiA5KKEcLH30LsZGt 1o9bet7K8qiBq4wOnUhXqxLS/gr3LL8oGUAHlPjHGiucwFaBYfh3ASK7Z20qizGmiuFUKR390sdRa VHtlv6nlenlEYBBK51Wg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qcAA8-000KwM-1I; Fri, 01 Sep 2023 19:50:36 +0000 Received: from mail-pl1-x62b.google.com ([2607:f8b0:4864:20::62b]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qcAA5-000Kv9-1U for linux-arm-kernel@lists.infradead.org; Fri, 01 Sep 2023 19:50:35 +0000 Received: by mail-pl1-x62b.google.com with SMTP id d9443c01a7336-1bf3a2f4528so19498535ad.2 for ; Fri, 01 Sep 2023 12:50:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1693597831; x=1694202631; darn=lists.infradead.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=TnGlOgpcJfhSyX3oWtweduRxRFI+vcvjVBEfz8W6REE=; b=kAfJhIU7Z0kMFLPzqnleHU+2nD0JRJWDzV8LQ+5su8TxrAl8+xpA4CM6SJCVrOTSGS RwdUNfagFjmIhKcxBN01QHjzXK8k30sYmK1PylsobaDwGCV7mzIu/9Umtg225V6jlwFZ oD6ExlgQjZPSq34q3NGqQxEdnNeO564i3XPl0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693597831; x=1694202631; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=TnGlOgpcJfhSyX3oWtweduRxRFI+vcvjVBEfz8W6REE=; b=DffDc9ZkBC+AfYAujd/uOMHITqdFXF4nBl2jl+R0+eU6zDmF/sfD7fE/6RrXiLsGrQ I34GHm1F4lM1ulIRei25qIiz2u3/IgjXixCNFrtVLkSJngrXnnm210NycF3gVFvXOJJW BzToxawDBtGcg68qURNhZTOrvyjBe7LAVG8c+Fbb1rBY+xeatSdi8UJVWb0PWwbL/HLz qgfh8wPXYQ4vRKhle1bQ7k6ErovWmZDBkaVHg3Nj5R4jexePWgtDTttJEALTzvZRh8qU lwb03J7vrfMzt1yhg9c843yKTVTeL2wjMnz4V768Q2291DPXm5TePzYHTsgDvo7vThSk XfuA== X-Gm-Message-State: AOJu0YyJHsCNfLscGs5ZBQLYoax9bvr6t+cx/ww3OspzUkpKREBfbM2k /jiMXlYIh8qaoaltkpB/C9iHEg== X-Google-Smtp-Source: AGHT+IFLMLtB06xgjItzzUv50zhsXFZ37ehwBfgJSIF2V6heU41cis1M/xhTkDTyzQL7J2okpu7MHw== X-Received: by 2002:a17:902:f682:b0:1c0:b7f4:5b86 with SMTP id l2-20020a170902f68200b001c0b7f45b86mr3871500plg.65.1693597830846; Fri, 01 Sep 2023 12:50:30 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id d10-20020a170902654a00b001b8b2b95068sm3397478pln.204.2023.09.01.12.50.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Sep 2023 12:50:30 -0700 (PDT) Date: Fri, 1 Sep 2023 12:50:29 -0700 From: Kees Cook To: Masahiro Yamada Cc: Nicolas Schier , Michael Ellerman , Christophe Leroy , Randy Dunlap , linux-kernel@vger.kernel.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-hardening@vger.kernel.org Subject: Re: [PATCH v3] kbuild: Show marked Kconfig fragments in "help" Message-ID: <202309011250.AB0DAA03@keescook> References: <20230831191335.give.534-kees@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230901_125033_571144_0D04FF4A X-CRM114-Status: GOOD ( 26.11 ) 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